#RIPCaleb: 13-Year-Old YouTube Star Suddenly Dies

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ARNOLD, MD -- Teen YouTube star Caleb Bratayley was pronounced dead last week after police responded to a medical emergency at the family's home in Maryland.

When the news went viral, Caleb’s fans took to twitter with #RIPCaleb.

Some even questioned how a seemingly healthy 13-year-old was suddenly dead.

Caleb's mother, Katie , who started the family's popular vlogs, confirmed on Instagram that her son died of natural causes .

Later, she claimed an undetected medical condition was the cause.

Friends, fans, and family members have flooded social media with video tributes and comments honoring Caleb. His memorial service will be live on periscope Tuesday night.

The beloved teen made this video titled "Dear Future Self" just a day before he passed.